Delboy255

Assuming filters are in good condition and wastegate valve not sticking, next suspect would be MAF sensor (on air intake).

Hi Geoff, Assuming this only started only after the filter was changed I would recheck all connections etc. Is there air bubbles flowing through the translucent piping at the fuel pump? This was an issue for me a number of times over the past 8 years. Would always use the correct thermostat in any case. My own galaxy is now approaching 310,000 miles and has been a poor hot starter for the past few months and would alway start instantly when cold. The starter recently packed up and a new starter has solved this issue. At no time did the starter seem lazy (slow) to turn over the engine. Apparently, some starter issues can be checked with VAG-Com software by switching to Auto Gearbox mode (if yours is manual that is) ? Good Luck.